The ABF Outlook software uses the .OB file to store the backup of the software. This file shall allow backup all the messages, address book, contacts, settings Email lists, signatures and message rules. These can be restored later. The file is used for taking such backup and restoring it if the system does not work or gets faulty. The backup file is useful till the date it was taken and upon restoring it shall go back to the previous date when it was made. The data needs to be refreshed and taken again as backup whenever the user feels that the system is going to crash or there is some other threat. The users always take backup of the mailbox and the same can be restored in case the operating system is re-installed.

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